I am from Brazil, which makes everythings more difficult.
I just got a BB 7100t and it has Simlock from T-Mobile USA.

A lot of people said that is possible to unlock it by a code. I tried and on the last step the phone asked for MEP CODE (10 LEFT). I do not have it. I tried to call T-Mobile from USA (yes, very expensive phone call) and after a while they said I need to have a T-Mobile active account to get the code. It is impossible to me.

It is impossible to send the phone overseas to unlock too. Is there anybody here who could help me? They said I should find a T-mobile active user and ask him to provide me the code. Are there anybody here who could help me?